今回の記事では塩ビについての特徴・加工方法・用途などについて解説します。
PVC production involves a process often called polymerization, whereby monomers of vinyl chloride are chemically bonded to sort a polymer chain. The 2 principal kinds of polymerization used are suspension polymerization and emulsion polymerization.
Vid temperaturer upp till sixty°C är styv PVC resistent mot de flesta oorganiska vätskor inklusive moderat koncentrerade syror samt alkali och icke-oxiderande saltlösningar i alla koncentrationer.
اعتقاد بر این است که بیشتر محصولات وینیلی زمانیکه بهطور صحیح مصرف شوند عموماً بیضررند هر چند تعدادی از افزودنیها و نرمکنندهها از محصول وینیلی میتوانند نشت کنند.
PVC was synthesized in 1872 by German chemist Eugen Baumann right after prolonged investigation and experimentation.[twelve] The polymer appeared to be a white solid inside a flask of vinyl chloride that had been left on a shelf sheltered from sunlight for 4 months. From the early twentieth century, the Russian chemist Ivan Ostromislensky and Fritz Klatte of your German chemical business Griesheim-Elektron equally tried to use PVC in commercial goods, but issues in processing the rigid, from time to time brittle polymer thwarted their endeavours.
The molecular framework of PVC is made of a lengthy-chain polymer with repeating vinyl chloride units. Every vinyl chloride unit consists of 1 carbon atom double-bonded to a chlorine atom and one-bonded to 2 hydrogen atoms.
In addition, it has good electrical insulation Houses, making it an acceptable materials for wiring and cable purposes.
در مقابل حرارت و نور نسبتاً ناپایدار بوده و هیدروژن کلرید از آن خارج میشود. این ماده اثرات زیانبخشی روی خواص اشیاء دم دست (اجزای الکتریکی) علاوه بر اثرات فیزیولوژیکی بر جای میگذارد. پیویسی پلاستیکی سخت است که بهوسیلهٔ اضافه کردن روانکنندهها نرم و انعطافپذیر میشود. بیشترین مورد استفادهٔ آن فتالیت است.
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Allt eftersom biltillverkarna har sökt efter lättare material har fler och fler detaljer i bilen blivit tillverkade i plast.
Certainly. An expanded PVC sheet has become created with inside and exterior employs in mind. You could as a result use it with assurance on exterior aspects of your boat Which may be exposed to rain, snow, sleet, and various adverse weather conditions. Can expanded marine PVC board be bent to condition?(display/disguise)
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حتی با شيش حصير وجود اینکه پیویسی اسباببازیهای نرم برای نوزادان برای سالها ساخته شدهاست، این نگرانی وجود دارد که این افزودنیها از اسباببازیهای نرم به دهان کودکانی که آن را به دهان میبرند نشت کند.
Premature ventricular contractions (PVCs) are added heartbeats that start in one of several coronary heart's two decrease pumping chambers (ventricles). These added beats disrupt the standard heart rhythm, at times leading to a sensation of the fluttering or possibly a skipped defeat within the chest.